1LHO

CRYSTAL STRUCTURE OF THE N-TERMINAL LG-DOMAIN OF SHBG IN COMPLEX WITH 5ALPHA-ANDROSTANE-3BETA,17BETA-DIOL

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.187 

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Literature

Steroid Ligands Bind Human Sex Hormone-binding Globulin in Specific Orientations and Produce Distinct Changes in Protein Conformation

Grishkovskaya, I., Avvakumov, G.V., Hammond, G.L., Catalano, M.G., Muller, Y.A.

(2002) J Biol Chem 277: 32086-32093

  • DOI: 10.1074/jbc.M203999200
  • Primary Citation of Related Structures:  
    1LHN, 1LHO, 1LHU, 1LHV

  • PubMed Abstract: 

    • The amino-terminal laminin G-like domain of human sex hormone-binding globulin (SHBG) contains a single high affinity steroid-binding site. Crystal structures of this domain in complex with several different steroid ligands have revealed that estradiol occupies the SHBG steroid-binding site in an opposite orientation when compared with 5 alpha-dihydrotestosterone or C19 androgen metabolites (5 alpha-androstan-3 beta,17 beta-diol and 5 alpha-androstan-3 beta,17 alpha-diol) or the synthetic progestin levonorgestrel ...

    The amino-terminal laminin G-like domain of human sex hormone-binding globulin (SHBG) contains a single high affinity steroid-binding site. Crystal structures of this domain in complex with several different steroid ligands have revealed that estradiol occupies the SHBG steroid-binding site in an opposite orientation when compared with 5 alpha-dihydrotestosterone or C19 androgen metabolites (5 alpha-androstan-3 beta,17 beta-diol and 5 alpha-androstan-3 beta,17 alpha-diol) or the synthetic progestin levonorgestrel. Substitution of specific residues within the SHBG steroid-binding site confirmed that Ser(42) plays a key role in determining high affinity interactions by hydrogen bonding to functional groups at C3 of the androstanediols and levonorgestrel and the hydroxyl at C17 of estradiol. Among residues participating in the hydrogen bond network with hydroxy groups at C17 of C19 steroids or C3 of estradiol, Asp(65) appears to be the most important. The different binding mode of estradiol is associated with a difference in the position/orientation of residues (Leu(131) and Lys(134)) in the loop segment (Leu(131)-His(136)) that covers the steroid-binding site as well as others (Leu(171)-Lys(173) and Trp(84)) on the surface of human SHBG and may provide a basis for ligand-dependent interactions between SHBG and other macromolecules. These new crystal structures have also enabled us to construct a simple space-filling model that can be used to predict the characteristics of novel SHBG ligands.

    Organizational Affiliation: 

    Forschungsgruppe Kristallographie, Max-Delbrück-Centrum für Molekulare Medizin, D-13092 Berlin, Germany.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SEX HORMONE-BINDING GLOBULINA189Homo sapiensMutation(s): 0 
Gene Names: SHBG
UniProt & NIH Common Fund Data Resources
Find proteins for P04278 (Homo sapiens)
Explore P04278 
Go to UniProtKB:  P04278
PHAROS:  P04278
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04278
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AOM
Query on AOM
Download Ideal Coordinates CCD File 
C [auth A]5-ALPHA-ANDROSTANE-3-BETA,17BETA-DIOL
C19 H32 O2
CBMYJHIOYJEBSB-YSZCXEEOSA-N		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
B [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.187 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.892α = 90
b = 103.892β = 90
c = 84.579γ = 120
Software Package:
Software NamePurpose
MAR345data collection
XDSdata reduction
CNSrefinement
XDSdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-10-23
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description